I have removed the cap, there is a 14mm nut in there, however I can't seem to get the crank arm off of the middle part...

that is why I think I need a puller.. The inside of the crank arm is threaded so I figure that is where the tool would screw on to and then allow me to turn the middle part to pry it off of the middle shaft thing...

You'll never get the crank assembly off by just removing the cover and the bolt. You will need a crank remover tool to get the assembly itself off.

caotropheus (above) has provided a link.

Steps:

1. Remove the cover (usually a screwdriver will work easily)

2. Remove the bolt (see others' posts above)

3. Thread on the crank puller (you will have to "back out" the center of this tool before threading it on).

4. Using a wrench, begin to feed the center of the crank puller back into the tool. You will begin to feel resistance when doing this -- this is normal and will happen as the tool "pulls" the crank assembly off of the spindle (the center of the tool will PUSH, while the outer part of the tool will PULL).

5. Remove the crank puller from the now-free assembly.

Older Campy bottom bracket tools will work with Sugino cranks as well. I just took one off of a Peugeot.

I would only add, be sure the washer from the bolt is out also. Make sure the extractor body is theaded in all the way and tight, when you start to turn the extractor bolt, go easy, its really easy to strip the threads in the crank arm. If it doesn't budge after using firm force on the extractor bolt, stop and try something else before you destroy the threads.

In a pinch you can ride the bike until the crank loosens. Never took me more than 1/4 mile.
Then I broke down and bought a cheap Nashbar crank puller. Works like a charm for around $8, and comes with 14 and 15mm sockets to boot.
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At your LBS, you can find the same crank puller as the $8 Nashbar puller under the name of Pyramid, Giant, or Summit. They're all made by Lifu. I've got one I got with the Giant label on the packaging, but it's made my Lifu. It works fine.

"There is hardly a man or woman who dares to be just what he or she is without doctoring up the impression." --A.W. Tozer

All I need to do now is determine the exact matching tool.. I don't want to spend $ 30 on a tool that won't fit and that I can't return !

I just want to be sure that the above link will be the right tool for this crank.

=(

The above mentioned Nashbar tool will work as will the CCP-2 from Park (about $14.00). This SUGINO tool will work as well. I bought one to remove the cranks from my 1980 Schwinn World Sport in 1984 and have used it on several JIS square taper cranks since then.

Go to parktool.com, and check-out the "repair help" section. There is a link to it at the top right corner of the page.
My bike had the 14mm bolts. I used the Park Tool CCP-2 after removing the bolts, and it worked fine. The guy at the LBS where I bought it said to lubricate the threads in the crank arm before screwing in the crank puller. He also said to tighten it in the crank with a wrench before doing the extraction. If you don't get a good grip on the crank, you will strip the threads right out of it.

I have the Park, and the Lifu, and another I can't remember the brand of. Call me crazy, but I always find myself reaching for the Lifu. I just prefer it for whatever reason. And, yea, buy it from your LBS if you can.